Automatic shut-off valve.



PATENTED MAR, 24

G. A. FULLIPP. AUTOMATIC SHUT-OFF VALVE.

APPLICATION PILED' AUG. 10.1907.

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UNITED STATES PATENT OFFICE.

GEORGE A. FULLIPP, OF EAST MCKEESPORT, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO WILLIAM H. LANG, OF EAST MCKEESPORT, PENNSYLVANIA.

AUTOMATIC SHUT-OFF VALVE.

Specification of Letters Patent.

Patented March 24, 1908..

Application filed August 10, 1907. Serial No. 387,978.

To all whom it may concern:

Be it known that I, GEORGE A. FI'JLLIPP, a citizen of the United States of America, residing at East McKeesport, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Shut- Off Valves, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to automatic shutoff valves, and it is designed as an improvement on the valve disclosed in Letters Patent of the United States, No. 852,174, granted to me under date of April 30th, 1907.

The primary object of the present invention is to provide a valve which will automatically close, and lock when the gas pressure is reduced, so that the gas supply will be entirely out off until the valve is released by hand.

A further object of the invention is to provide the valve stem of the valve shown in the Letters Patent above referred to with a supplemental disk valve operating within a valve-chamber or dash pot formed in the up per portion of the valve-casing, and this supplemental valve which operates as a piston constitutes the distinguishing feature of the present invention over that disclosed in my former patent hereinbefore mentioned.

In the drawing, Figure 1 is a front elevation of the valve-casing with its indicatorplate, Fig. 2 is a side elevation of the same, Fig. 3 is a vertical section taken on the line 90-90 of Fig. 2 showing the supplemental valve or piston, Fig. 4 is a top plan of the device with parts removed, Fig. 5 is a side elevation. of the weighted lever and locking tumbler employed, Fig. 6 is a detail elevation of the valve and a part of its stem, showing the means for securing the valve to the stem, and Fig. 7 is a top plan of the valve, the stem being shown in longitudinal section.

The reference numeral 1 designates the valve-casing provided with a beveled valveseat 2 to receive a correspondinglybeveled valve 3, secured to. the lower end of a stem 4. The two ends of the casing 1 are internally threaded for the attachment of suitable inlet and discharge pipes (not shown) and the top of said casing is provided with an intern ally threaded opening 5 to receive a closure cap 6, having a depending annular threaded flange 7 to fit the opening. This depending flange 7 provides a cylindrical chamber 7 serving as a dash-pot within which is located a disk 7 b mounted upon the valve-stem 4 and adjustably secured thereto by a set screw 7.

The cap 6 is formed with a central opening for the passage of the valve stem and the upper surface of said cap is formed with a circular recess 8 to receive a plug 9, centrally bored to permit the valve stem to extend through it, and having a packing 10 to prevent leakage of gas around the stem.

Projecting centrally from the cap 6 is an integral block 11 to the opposite sides of which are secured by screws 12 a front plate 13, and a back plate 14. Said plates are secured to each other by screws 15 and a casing 15 and from the inner faces ofsaid plates project oppositely disposed hollow studs 16, 17 and 18, arranged in pairs to serve as bearings for shafts 19, 20 and 21, said shafts being squared at their central portions as shown at 20 in Fig. 5. I

Pivotally mounted upon the shaft 21 is a lever 22 which extends through a slot 23 formed in the valve stem, and is provided near its free end with a retracting coil spring 24, one end of said spring being secured to the lever, and the opposite end thereof to the inner face of the front plate 13.

The free end of the lever 22 is formed with a notch 25 adapted to be engaged by a dog 26 pivotally supported upon the shaft 19, and carrying a weight 27, adapted to strike against a stop pin 28 when the dog is disengaged from the notched end of the lever. The shaft 19 upon which the gravity-dog is mounted extends through the front plate 13, and to this extended front end of said shaft is pivotally attached, a finger piece 29, by means of which the dog is turned to release it from engagement with the lever 22.

Upon the upper shaft 20 is fulcrumed a bent lever 30 to one end of which is secured a weight 31. The other end of this weighted lever is connected by a link 32 to the notched end of the lever 22, the ends of said link being ivotally secured-to said levers. Dependmg from the central bearing 33 of the lever 30 and preferably formed integral therewith, is a hook-shaped locking arm. or tumbler 34, adapted to bear against the upper end of the valve stem to lock the latter and the valve against upward movement.

The shaft 20 extends through the plate 13, and carries at its front end, a finger-piece 35 for' turning said shaft and a pointer 36. Suitable marks, such as the arrow shown in Fig. 1 are placed on the front plate to'indicate the position of the valve. WVhen the pointer is in the horizontal position shown 1n the Fig. 1, it indicates that the valve is closed and locked, but when the pointeris in a downwardly inclined position, pointing to the lower arrow it indicates that the valve is open.

Fi s. 6 and 7 illustrate the manner of securing t e valve 3 to the stem 4. The 11 per surface of the valve 3 is formed with a ori- Zontally disposed U-shaped flange 37 having an undercut groove 38 to receive a collar 39 formed on the lower end of the stem 4. After this collar has been slipped into the groove 38, the stem is secured by a cross-pin 40 fitting alined openings formed in the ends of the flange. A transverse pin 41 projecting from the plate 14 serves as a guide for the stem 4.

The utility and operation of the device constructed as thus described, will be readily understood. l/Vhen the valve 3 is seated, the mechanism will be in the position shown in Fig. 3 with the locking dog 26 in engagement with the notched end of the lever 22, and the locking arm or tumbler resting upon the upper end of the valve stem. Thus the valve is closed, and will remain seated until the dog is released by means of the fingerpiece 29. When the dog 26 is released from engagement with the notch 25 in the lever 22, the locking arm 34 is moved from its locking position on the upper end of valve stem 4, which is accomplished by turning the shaft 20 by means of the finger-piece 35 connected to the outer end thereof. pressure of the gas on the lower face of the valve 3 exceeds the tension of the spring 24, the valve is free to be raised under the pres sure of the gas, and is held elevated in the position shown by dotted lines, the levers 22 and 30 and locking arm 34 being also held in the position shown by dotted lines in Fig. 1, the parts remaining in said positions so long as the pressure of the gas remains normal or of a pressure sufficient to overcome the tension of the spring 24. When, however, the flow of gas ceases, or the pressure is reduced If thematerially below the tension of the spring 24, the latter pulling down on the free end of the [lever 22, engages same with the dog 26, and the valve having moved to closed position, is held in its position by dog 26 en gaging with the lever 22, and locking arm or tumbler engaging with the upper end of the valve stem 4.

The disk or supplemental valve 7 operates as a piston within the chamber 7 guiding and regulating the movement of the valve stem.

Having now described my invention what I claim as new, is:-

1. In a regulating valve, the combination with a valve casing provided at its upper end with a cylindrical chamber and having a valve seat in alinement with said chamber, of a valve stem extending through said chamber and into said casing, a valve on the lower end of said stem and adapted to fit against said seat, an adjustable disk carried by the stem and positioned within said cylindrical chamber, and means arranged exteriorly of the valve casing and engaging the outer end of the valve stem for looking it when the valve is closed.

2. In a regulating valve, the combination with a valve casing formed with an intern al seat and having in its upper portion an open ing with the wall thereof threaded, of a cap having a depending exteriorly threaded flange extending in said opening and engaging the threads of the casing, said flange forming a cylindrical chamber at the top casing, a valve seat within the casing and in alinement with said chamber, a valve stem extending through said chamber and into said casing, a valve on the lower end of said stem adapted to engage said seat, a disk mounted on said stem, positioned within said cylindrical chamber and constituting a piston, and means exterior of the valve casing and engaging the outer end of the valve stem for looking it when the valve is seated.

In testimony whereof I affix my signature in the presence of two witnesses.

GEORGE A. FULLIPP. Witnesses:

A. H. RABsAY, MAX H. SROLOVITZ. 

